. organise information clearly– use specialist vocabulary where appropriate.For this paper you must have:● a pencil and a ruler● a calculator● a Data and Formulae Booklet.Physics A PHYA1 Unit. An unstable nucleus, A ZX, can decay by emitting a β–particle.3 (a) (i) What part of the atom is the same as a β–particle? (1 mark)3 (a) (ii) State the changes, if any, in A and Z when. reserved.(16)(JAN1 0PHYA10 1)WMP/Jan10 /PHYA1 PHYA1Centre NumberSurnameOther NamesCandidate SignatureCandidate NumberGeneral Certificate of EducationAdvanced Subsidiary ExaminationJanuary 2010Time allowed●1 hour...